morphological binary dilation by a ball More...
Detailed Description
morphological binary dilation by a ball
Usage: dilatball in.pgm r [dist] out.pgm
Description: Morphological binary dilation by a metric ball. If the parameter r is a positive integer, then the structuring element for this dilation is a ball (or a disc) of radius r. In this case the result of the dilation is defined by Y = {x; d(x,X) <= r} where X represents the original point set (non-null pixels in the original image). If the parameter r is -1, then the structuring element for each point x is a ball (or a disc) of radius F(x), where F is the greyscale image in.pgm .
The dilation is computed by thresholding a distance map. The distance used depends on the optional parameter dist (default is 0) :
- 0: rounded Euclidean distance
- 1: approximate quadratic Euclidean distance
- 2: chamfer distance
- 3: exact quadratic Euclidean distance
- 4: 4-distance in 2d
- 8: 8-distance in 2d
- 6: 6-distance in 3d
- 18: 18-distance in 3d
- 26: 26-distance in 3d
- Warning:
- Except for the case r=-1, the input image in.pgm must be a binary image. No test is done.
Types supported: byte 2d, byte 3d
Category: morpho
Example:
dilatball cells 4 cells_dilatball
| 
|
| cells | cells_dilatball |
